Game Boy

Year : 1989
CPU : Z80
CPU speed : 8 Mhz
Resolution : 160 x 144
O'Leary Manager 2000
Obelix
Oddworld Adventures
Oddworld Adventures II
Ohasuta Dance Dance Revolution GB
Ohasuta Yamachan & Raymond
Oide Rascal
Oira Jajamaru! Sekai Daibouken
Ojarumaru - Mitsunegai Jinja no Ennichi de Ojaru!
Ojarumaru - Tsukiyo ga Ike no Takaramono
Olympic Summer Games
On the Tiles - Franky, Joe & Dirk
Oni
Oni 2 - Innin Densetsu
Oni 3 - Kuro no Hakaishin
Oni 4 - Kishin no Ketsuzoku
Oni 5 - Innin o Tsugumono
Onigashima Pachinko Ten
Operation C
Original Moorhuhn Jagd, Die